Update references to the mailing lists that have moved to Discourse.
diff --git a/llvm/docs/GettingInvolved.rst b/llvm/docs/GettingInvolved.rst
index 5d0ed62..f7cd97b 100644
--- a/llvm/docs/GettingInvolved.rst
+++ b/llvm/docs/GettingInvolved.rst
@@ -96,21 +96,18 @@
 :doc:`Release notes for the current release <ReleaseNotes>`

    This describes new features, known bugs, and other limitations.

 

-.. _mailing-lists:

+.. _lists-forums:

 

-Mailing Lists

--------------

+Forums & Mailing Lists

+----------------------

 

-If you can't find what you need in these docs, try consulting the mailing

-lists. In addition to the traditional mailing lists there is also a

-`Discourse server <https://llvm.discourse.group>`_ available.

+If you can't find what you need in these docs, try consulting the

+Discourse forums. There are also commit mailing lists for all commits to the LLVM Project.

 

-`Developer's List (llvm-dev)`__

-  This list is for people who want to be included in technical discussions of

-  LLVM. People post to this list when they have questions about writing code

-  for or using the LLVM tools. It is relatively low volume.

+`LLVM Discourse`__

+  The forums for all things LLVM and related sub-projects. There are categories and subcategories for a wide variety of areas within LLVM. You can also view tags or search for a specific topic. 

 

-  .. __: http://lists.llvm.org/mailman/listinfo/llvm-dev

+  .. __: https://discourse.llvm.org/

 

 `Commits Archive (llvm-commits)`__

   This list contains all commit messages that are made when LLVM developers

@@ -127,18 +124,10 @@
 

   .. __: http://lists.llvm.org/pipermail/llvm-bugs/

 

-`Test Results Archive (llvm-testresults)`__

-  A message is automatically sent to this list by every active nightly tester

-  when it completes.  As such, this list gets email several times each day,

-  making it a high volume list.

+`LLVM Announcements`__

+  If you just want project wide announcements such as releases, developers meetings, or blog posts, then you should check out the Announcement category on LLVM Discourse. 

 

-  .. __: http://lists.llvm.org/pipermail/llvm-testresults/

-

-`LLVM Announcements List (llvm-announce)`__

-  This is a low volume list that provides important announcements regarding

-  LLVM.  It gets email about once a month.

-

-  .. __: http://lists.llvm.org/mailman/listinfo/llvm-announce

+  .. __: https://discourse.llvm.org/c/announce/46 

 

 .. _online-sync-ups:

 

diff --git a/llvm/docs/Security.rst b/llvm/docs/Security.rst
index 04cf5ca..009cdaf 100644
--- a/llvm/docs/Security.rst
+++ b/llvm/docs/Security.rst
@@ -22,7 +22,7 @@
 
 To report a security issue in the LLVM Project, please `open a new issue`_ in the LLVM project page, on the chromium issue tracker.  Be sure to use the "Security bug report" template.
 
-We aim to acknowledge your report within two business days since you first reach out. If you do not receive any response by then, you can escalate by sending a message to the `llvm-dev mailing list`_ asking to get in touch with someone from the LLVM Security Group. **The escalation mailing list is public**: avoid discussing or mentioning the specific issue when posting on it.
+We aim to acknowledge your report within two business days since you first reach out. If you do not receive any response by then, you can escalate by posting on the `Discourse forums`_ asking to get in touch with someone from the LLVM Security Group. **The escalation mailing list is public**: avoid discussing or mentioning the specific issue when posting on it.
 
 
 Group Composition
@@ -177,7 +177,7 @@
 * Propose member removal.
 * Suggest policy changes.
 
-We often have these discussions publicly, in our :ref:`monthly public sync-up call <online-sync-ups>` and on public LLVM mailing lists.  For internal or confidential discussions, we also use a private mailing list.
+We often have these discussions publicly, in our :ref:`monthly public sync-up call <online-sync-ups>` and on the Discourse forums.  For internal or confidential discussions, we also use a private mailing list.
 
 Process
 =======
@@ -230,6 +230,6 @@
 .. _open a new issue: https://bugs.chromium.org/p/llvm/issues/entry
 .. _chromium issue tracker: https://crbug.com
 .. _GitHub security: https://help.github.com/en/articles/about-maintainer-security-advisories
-.. _llvm-dev mailing list: https://lists.llvm.org/mailman/listinfo/llvm-dev
+.. _Discourse forums: https://discourse.llvm.org
 .. _MITRE: https://cve.mitre.org
 .. _example nomination is available here: https://reviews.llvm.org/D99232
diff --git a/llvm/docs/Statepoints.rst b/llvm/docs/Statepoints.rst
index 15b4406..25f0a09 100644
--- a/llvm/docs/Statepoints.rst
+++ b/llvm/docs/Statepoints.rst
@@ -803,7 +803,6 @@
 <https://bugs.llvm.org/buglist.cgi?cmdtype=runnamed&namedcmd=Statepoint%20Bugs&list_id=64342>`_
 for [Statepoint] in the summary field. When filing new bugs, please
 use this tag so that interested parties see the newly filed bug.  As
-with most LLVM features, design discussions take place on `llvm-dev
-<http://lists.llvm.org/mailman/listinfo/llvm-dev>`_, and patches
+with most LLVM features, design discussions take place on the `Discourse forums <https://discourse.llvm.org>`_ and patches
 should be sent to `llvm-commits
 <http://lists.llvm.org/mailman/listinfo/llvm-commits>`_ for review.
diff --git a/llvm/docs/SupportPolicy.rst b/llvm/docs/SupportPolicy.rst
index 2d68e48..0766522 100644
--- a/llvm/docs/SupportPolicy.rst
+++ b/llvm/docs/SupportPolicy.rst
@@ -201,8 +201,8 @@
 of steps are taken.
 
 A minimum set of steps should be:
- #. A proposal for removal / deactivation should be made to the developers'
-    mailing lists (``llvm-dev``, ``cfe-dev``, ``lldb-dev``, etc), with a clear
+ #. A proposal for removal / deactivation should be made to the Discourse forums 
+    (under the appropriate category), with a clear
     statement of the maintenance costs imposed and the alternatives, if
     applicable.
  #. There must be enough consensus on the list that removal is warranted, and no
diff --git a/llvm/docs/index.rst b/llvm/docs/index.rst
index 12e30ad..d1e1e78 100644
--- a/llvm/docs/index.rst
+++ b/llvm/docs/index.rst
@@ -83,7 +83,7 @@
 
 * :doc:`GettingInvolved`
 * :ref:`development-process`
-* :ref:`mailing-lists`
+* :ref:`lists-forums`
 * :ref:`meetups-social-events`
 * :ref:`community-proposals`